#---------------------------------------------------------------------------------
# Clear the implicit built in rules
#---------------------------------------------------------------------------------
.SUFFIXES:

#---------------------------------------------------------------------------------
# TARGET is the name of the output
# BUILD is the directory where object files & intermediate files will be placed
# SOURCES is a list of directories containing source code
# INCLUDES is a list of directories containing extra header files
#---------------------------------------------------------------------------------
TARGET		:=	$(notdir $(CURDIR))
BUILD		:=	build
SOURCES		:=	source
DATA		:=	data
INCLUDES	:=  include  ../libcios/include
#SCRIPTDIR	:=  scripts.debug
SCRIPTDIR	:=  scripts
BIN		:=  bin

#DEBUG		:=  -DDEBUG

STRIPIOSPLUGIN	:=  ../stripiosplugin/stripiosplugin.exe

LIBS		:=	
LIBDIRS		:=

CFLAGS+= $(DEBUG)

#---------------------------------------------------------------------------------
# the prefix on the compiler executables
#---------------------------------------------------------------------------------
#$(DEVKITARM)/bin/
#PREFIX		:= arm-eabi-
PREFIX		:= $(DEVKITARM)/bin/arm-eabi-
CC			:= $(PREFIX)gcc
CXX			:= $(PREFIX)g++
AR			:= $(PREFIX)ar
OBJCOPY		:= $(PREFIX)objcopy
LD			:= $(PREFIX)g++
AS			:= $(PREFIX)g++

#---------------------------------------------------------------------------------
# linker script
#---------------------------------------------------------------------------------
LINKSCRIPT		:= $(ROOT)/$(SCRIPTDIR)/link.ld
SPECS			:= $(ROOT)/$(SCRIPTDIR)/nostart.specs	

ifeq ($(BUILDING),$(emptystring))

export ROOT	:= $(CURDIR)


all:
	@[ -d $(BUILD) ] || mkdir -p $(BUILD)
	@$(MAKE) -C $(BUILD) --no-print-directory -f $(CURDIR)/Makefile BUILDING=all
clean:
	@echo clean ...
	@rm -fr $(BUILD) $(BIN)/*.elf
else

TARGET := $(notdir $(ROOT))
STRIPIOSPLUGIN := $(ROOT)/$(STRIPIOSPLUGIN)
#----------------------------------------------------
# MS Visual Studio Style Fix:
#----------------------------------------------------
#STYLEFIX	= 2>&1 | sed -e 's/\([a-zA-Z\.]\+\):\([0-9]\+\):\([0-9]\+:\)\?\(.\+\)/\1(\2):\4/' -e 's/undefined/error: undefined/'
STYLEFIX	?= 

#---------------------------------------------------------------------------------
# automatically build a list of object files for our project
#---------------------------------------------------------------------------------
OUTPUT		:=  $(ROOT)/$(BIN)/$(TARGET)
CFILES		:=	$(foreach dir,$(SOURCES),$(notdir $(wildcard $(ROOT)/$(dir)/*.c)))
CPPFILES	:=	$(foreach dir,$(SOURCES),$(notdir $(wildcard $(ROOT)/$(dir)/*.cpp)))
sFILES		:=	$(foreach dir,$(SOURCES),$(notdir $(wildcard $(ROOT)/$(dir)/*.s)))
SFILES		:=	$(foreach dir,$(SOURCES),$(notdir $(wildcard $(ROOT)/$(dir)/*.S)))
BINFILES	:=	$(foreach dir,$(DATA),$(notdir $(wildcard $(ROOT)/$(dir)/*.*)))

OFILES		:=	$(addsuffix _bin.o,$(BINFILES)) \
					$(CPPFILES:.cpp=_cpp.o) $(CFILES:.c=_c.o) \
					$(sFILES:.s=_s.o) $(SFILES:.S=_S.o)

DEPENDS		:= $(OFILES:.o=.d)

VPATH		=  $(foreach dir,$(SOURCES),$(ROOT)/$(dir))


#---------------------------------------------------------------------------------
# options for code generation
#---------------------------------------------------------------------------------
INCLUDE	:=			$(foreach dir,$(INCLUDES),-I$(ROOT)/$(dir)) \
					$(foreach dir,$(LIBDIRS),-I$(dir)/include) \
					-I$(ROOT)/$(BUILD) 

#---------------------------------------------------------------------------------
# build a list of library paths
#---------------------------------------------------------------------------------
LIBPATHS	:=	$(foreach dir,$(LIBDIRS),-L$(dir)/lib) 

ARCH	=	-mcpu=arm9tdmi -mtune=arm9tdmi -mthumb -mthumb-interwork -mbig-endian

CFLAGS	+= -g $(ARCH) $(INCLUDE) -fno-strict-aliasing -Wall -Os -fomit-frame-pointer -ffast-math -fverbose-asm -Wpointer-arith -Winline -Wundef -g -ffunction-sections -fdata-sections -fno-exceptions 
CFLAGS	+= -Wstrict-prototypes


AFLAGS	=	-g $(ARCH) -x assembler-with-cpp

LDFLAGS	= -g $(ARCH) -specs=$(SPECS) -T$(LINKSCRIPT)  $(LIBPATHS) $(LIBS) -Wl,--gc-sections -Wl,-static -Wl,-Map,$(TARGET).map -nostartfiles


$(OUTPUT).bin: $(TARGET).elf
	@echo Stripping plugin $(notdir $@)
	$(OBJCOPY)  -O binary $(TARGET).elf $(OUTPUT).bin
#	arm-eabi-objcopy  -O binary $(TARGET).elf $(OUTPUT).bin
#	$(STRIPIOSPLUGIN) $< $@


%.elf: $(OFILES)
	@echo linking $(notdir $@)
	@$(LD) -g -o $@ $(OFILES) $(LDFLAGS) $(STYLEFIX)


%_cpp.o : %.cpp
	@echo $(notdir $<)
	@$(CXX) -MMD -MF $*_cpp.d $(CFLAGS) -c $< -o$@ $(STYLEFIX)

%_c.o : %.c
	@echo $(notdir $<)
	@$(CC) -MMD -MF $*_c.d $(CFLAGS)  -c $< -o$@ $(STYLEFIX)

%_s.o : %.s
	@echo $(notdir $<)
	@$(AS) -MMD -MF $*_s.d $(AFLAGS) -c $< -o$@ $(STYLEFIX)

%_bin.o : %.bin
	@echo $(notdir $<)
	@$(bin2o)

-include $(DEPENDS)

define bin2o
	@echo  -e "\t.section .rodata\n\t.align 4\n\t.global $(*)\n\t.global $(*)_end\n$(*):\n\t.incbin \"$(subst /,\\\\\\\\,$(shell echo $< | sed 's=/==;s=/=:/='))\"\n$(*)_end:\n" > $@.s
	@$(CC)  $(ASFLAGS) $(AFLAGS) -c $@.s -o $@
	@rm -rf $@.s
endef

endif
